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Thomas Kershaw

CIK 1686179 · Chief Technology Officer · last filed 2021-05-19

Thomas Kershaw is a Chief Technology Officer who has filed 27 SEC Form 4 insider transactions across 2 companies since 2016. The most recent filing shows the insider sold $1.1M of MGNI on May 19, 2021. Across all open-market trades the lifetime net is −$11.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.3M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$9.33M

Companies

2

Total Filings

27

Lifetime Open-Market Net

-$11.04M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
MGNI Chief Technology Officer 473,763 $19.70 $9.33M -$9.52M 7 2021-05-19
RUBI Chief Technology Officer 11 $2.16 $24 -$1.52M 20 2020-06-05

Recent Filings

27 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2021-05-19 MGNI Sell (S) −41,213 -$1.07M EDGAR
2021-04-07 MGNI Sell (S) −100,000 -$4.05M EDGAR
2021-04-05 MGNI Grant (A) +31,760 $0 EDGAR
2021-02-18 MGNI Mixed — -$2.71M EDGAR
2021-02-18 MGNI Mixed −30,393 -$495.6K EDGAR
2020-11-18 MGNI Sell (S) −30,393 -$336.1K EDGAR
2020-08-19 MGNI Mixed — -$165.3K EDGAR
2020-06-05 RUBI Mixed — -$73.4K EDGAR
2020-06-05 RUBI Sell (S) −52,285 -$274.6K EDGAR
2020-05-20 RUBI Sell (S) −49,915 -$262.4K EDGAR
Showing 1–10 of 27
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.